參數資料
型號: L64381
廠商: LSI Corporation
英文描述: 4-Port Ethernet Controller(四端口以太網控制器)
中文描述: 4端口以太網控制器(四端口以太網控制器)
文件頁數: 33/109頁
文件大小: 815K
代理商: L64381
Data FIFO Registers
2-17
Figure 2.13
Statistics Counters
Data Out Register 0
Figure 2.14
Statistics Counters
Data Out Register 1
2.7
Data FIFO
Registers
This section describes the five registers that are used to access the Data
FIFO: the Data FIFO Address Register, the two Data FIFO Data In Reg-
isters, and the two Data FIFO Data Out Registers. The Transmit and
Receive FIFOs contain 128 bytes in a 32 x 36 bit array. Refer to Section
4.2, “On-chip FIFOs,” for more information on the configuration of the
FIFOs.
2.7.1
Data FIFO
Address
Register
contains the address for either a Data FIFO read or a Data FIFO write.
Note that transfers between the Data FIFO Address Register and the
Data FIFO occur only in Diagnostic Modes 1 and 3.
In Diagnostic Modes 1 and 3, the entire 36-bit wide FIFO can be tested.
To write to a 36-bit location in the Data FIFO, the lower 32 bits are placed
in the Data FIFO Data In Registers. The upper four bits are written to the
Data FIFO from the WRAM field of the Data FIFO Address Register. To
read back a Data FIFO location, the lower 32 bits are read into the Data
FIFO Data Out Registers. The upper four bits are placed in the RRAM
field of the Data FIFO Address Register.
15
0
Statistics Counters Data Out [15:0]
15
0
Statistics Counters Data Out [31:16]
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